Mercurial > hg > truffle
view src/share/vm/services/nmtDCmd.hpp @ 12110:4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
Summary: Replace the broken large pages implementation on Linux. New flag: -XX:+UseTransparentHugePages - Linux specific flag to turn on transparent huge page hinting with madvise(..., MAP_HUGETLB). Changed behavior: -XX:+UseLargePages - tries to use -XX:+UseTransparentHugePages before trying other large pages implementations (on Linux). Changed behavior: -XX:+UseHugeTLBFS - Use upfront allocation of Large Pages instead of using the broken implementation to dynamically committing large pages. Changed behavior: -XX:LargePageSizeInBytes - Turned off the ability to use this flag on Linux and provides warning to user if set to a value different than the OS chosen large page size. Changed behavior: Setting no large page size - Now defaults to use -XX:UseTransparentHugePages if the OS supports it. Previously, -XX:+UseHugeTLBFS was chosen if the OS was configured to use large pages.
Reviewed-by: tschatzl, dcubed, brutisso
author | stefank |
---|---|
date | Fri, 16 Aug 2013 13:22:32 +0200 |
parents | 31a4e55f8c9d |
children | 833b0f92429a |
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/* * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_SERVICES_NMT_DCMD_HPP #define SHARE_VM_SERVICES_NMT_DCMD_HPP #include "services/diagnosticArgument.hpp" #include "services/diagnosticFramework.hpp" /** * Native memory tracking DCmd implementation */ class NMTDCmd: public DCmdWithParser { protected: DCmdArgument<bool> _summary; DCmdArgument<bool> _detail; DCmdArgument<bool> _baseline; DCmdArgument<bool> _summary_diff; DCmdArgument<bool> _detail_diff; DCmdArgument<bool> _shutdown; DCmdArgument<bool> _auto_shutdown; #ifndef PRODUCT DCmdArgument<bool> _debug; #endif DCmdArgument<char*> _scale; public: NMTDCmd(outputStream* output, bool heap); static const char* name() { return "VM.native_memory"; } static const char* description() { return "Print native memory usage"; } static const char* impact() { return "Medium"; } static const JavaPermission permission() { JavaPermission p = {"java.lang.management.ManagementPermission", "monitor", NULL}; return p; } static int num_arguments(); virtual void execute(DCmdSource source, TRAPS); }; #endif // SHARE_VM_SERVICES_NMT_DCMD_HPP